Because this research is a group randomized trial, eligibility criteria were based primarily on school characteristics rather than student characteristics. Schools eligible for recruitment were required to: 1) identify as either an area learning center (ALC), alternative learning program (ALP) or contracted alternative, 2) be open year around (a requirement for all state ALCs; an option for ALPs), 3) enroll 11th and 12th grade students, 4) project a September 2006 enrollment of 75 students, 5) require student attendance on campus at least 10 hours/week and 6) have access to an indoor facility for physical activity. Therefore, all students attending a participating school were eligible to take part in the study and exclusion will occur only in case of parental or student denial of consent. Students and parents/guardians of students who were not fluent in English were not included in measurement.